A
PPENDIX
B
| Cables
Twisted-Pair Cable and Pin Assignments
– 70 –
1000BASE-T P
IN
A
SSIGNMENTS
All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use
straight-through cables for all network connections to PCs or servers, or to other
switches or hubs.
The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These
ports require that all four pairs of wires be connected. Note that for 1000BASE-T
operation, all four pairs of wires are used for both transmit and receive.
Use 100-ohm Category 5, 5e or 6 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable for 1000BASE-T connections. Also be sure that the
length of any twisted-pair connection does not exceed 100 meters (328 feet).
C
ABLE
T
ESTING
FOR
E
XISTING
C
ATEGORY
5 C
ABLE
Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk
(NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified
in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test
parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These
tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional
Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”
Note that when testing your cable installation, be sure to include all patch cables
between switches and end devices.
Table 13: 1000BASE-T MDI and MDI-X Port Pinouts
Pin
MDI Signal Name
MDI-X Signal Name
1
Bi-directional Pair A Plus (BI_DA+)
Bi-directional Pair B Plus (BI_DB+)
2
Bi-directional Pair A Minus (BI_DA-)
Bi-directional Pair B Minus (BI_DB-)
3
Bi-directional Pair B Plus (BI_DB+)
Bi-directional Pair A Plus (BI_DA+)
4
Bi-directional Pair C Plus (BI_DC+)
Bi-directional Pair D Plus (BI_DD+)
5
Bi-directional Pair C Minus (BI_DC-)
Bi-directional Pair D Minus (BI_DD-)
6
Bi-directional Pair B Minus (BI_DB-)
Bi-directional Pair A Minus (BI_DA-)
7
Bi-directional Pair D Plus (BI_DD+)
Bi-directional Pair C Plus (BI_DC+)
8
Bi-directional Pair D Minus (BI_DD-)
Bi-directional Pair C Minus (BI_DC-)
Содержание 8028L2
Страница 1: ...INSTALLATION GUIDE ta TigerSwitchTM 10 100 1000 28 Port Gigabit Ethernet Switch SMC8028L2 ...
Страница 2: ......
Страница 4: ...20 Mason Irvine CA 92618 Phone 949 679 8000 ...
Страница 16: ...COMPLIANCES AND SAFETY STATEMENTS 14 ...
Страница 22: ...TABLES 20 ...
Страница 24: ...FIGURES 22 ...
Страница 30: ...CHAPTER 1 Introduction Description of Hardware 28 ...
Страница 46: ...CHAPTER 3 Installing the Switch Connecting to the Console Port 50 Data bits 8 Flow control none ...
Страница 72: ...GLOSSARY 84 ...
Страница 75: ......
Страница 76: ...20 Mason Irvine CA 92618 Phn 949 679 8000 www smc com 150200062800A R02 150200000155A R01 SMC8028L2 ...